How to implement LTM forward proxy client to determine the diversion pool based on the domain name

Thank you very much. Maybe it's still not the part I need.

I am trying the following part to capture the domain name IP through 0.0.0.0:53 to 0.0.0.0:0 vs. getting dictionary information to match the diversion, but I don't like this method very much

when DNS_RESPONSE {
    set requested_domain [DNS::question name]  ;# 获取查询的域名

    # 指定允许存储的域名列表（只记录这些域名）
    set allowed_domains {
        "google.com"
        "baidu.com"
        "yahoo.com"
    }

    # 检查域名是否在允许列表中
    if { [lsearch -exact $allowed_domains $requested_domain] == -1 } {
        log local0. "Ignoring domain: $requested_domain (not in allowed list)"
        return
    }

    # 获取已存储的 IP 列表（如果存在）
    set existing_ips [table lookup "DNS_$requested_domain"]
    
    # 初始化一个新的 IP 列表
    set ip_list {}

    foreach answer [DNS::answer] {
        if { [DNS::type $answer] eq "A" } {
            set resolved_ip [DNS::rdata $answer]  ;# 获取解析的 IP 地址
            
            # 如果已存储的 IP 列表存在，先解析它
            if { $existing_ips ne "" } {
                set ip_list [split $existing_ips ","]
            }
            
            # 只添加新 IP，避免重复存储
            if { [lsearch -exact $ip_list $resolved_ip] == -1 } {
                lappend ip_list $resolved_ip
            }
        }
    }

    # 存储更新后的 IP 列表（用逗号分隔）
    if { [llength $ip_list] > 0 } {
        table set "DNS_$requested_domain" [join $ip_list ","] 300
        log local0. "Stored: $requested_domain -> [join $ip_list ","]"
    }
}